Finding the Fourth Proportional to 1,278,441.12, 1,917,163.20 and 479,287.08
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Solution
The fourth proportional to 1,278,441.12, 1,917,163.20 and 479,287.08 is: 718,743.74
Step by Step Solution
- Step 1: Write the proportion equation
1,278,441.12 : 1,917,163.20 = 479,287.08 : x - Step 2: Convert to fraction form
1,278,441.12/1,917,163.20 = 479,287.08/x - Step 3: Cross multiply
1,278,441.12x = 1,917,163.20 × 479,287.08 - Step 4: Simplify right side
1,278,441.12x = 918,871,552,011.46 - Step 5: Solve for x
x = 918,871,552,011.46/1,278,441.12 - Step 6: Final answer
x = 718,743.74
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.